Biology Ease Staff asked 2 years ago
Telophase and Telophase I are two distinct phases of cell division that occur during different types of cell division processes: mitosis and meiosis, respectively. Here are the main differences between Telophase and Telophase I:
Telophase (Mitosis):
– Telophase is the final phase of mitosis, which is a part of the cell cycle involved in the division of somatic (non-reproductive) cells.
– In Telophase, the sister chromatids, which are the replicated copies of chromosomes, reach opposite poles of the cell.
– Nuclear envelopes re-form around the separated chromatids, establishing two distinct nuclei.
– The chromatin inside the nuclei begins to decondense, and nucleoli may reappear.
– Cytokinesis, the division of the cytoplasm, usually occurs shortly after Telophase, resulting in the formation of two identical daughter cells.
Telophase I (Meiosis):
– Telophase I is the final phase of the first division of meiosis, a specialized form of cell division involved in the production of gametes (sperm and eggs) for sexual reproduction.
– Telophase I follows the separation of homologous chromosomes during Anaphase I.
– In Telophase I, the homologous chromosomes reach opposite poles of the cell.
– Nuclear envelopes re-form around the separated chromosomes, creating two distinct nuclei.
– Chromatin decondenses, and nucleoli may reappear.
– Unlike in mitosis, cytokinesis typically does not occur after Telophase I. Instead, the cell proceeds directly into meiosis II, without a significant period of growth or DNA replication.
In summary, Telophase is the final phase of mitosis, while Telophase I is the final phase of the first division of meiosis. Telophase concludes the separation of sister chromatids in mitosis, while Telophase I marks the separation of homologous chromosomes in meiosis. The occurrence of cytokinesis also differs, with cytokinesis typically following Telophase in mitosis but not immediately following Telophase I in meiosis.